<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Same Origin Frame</title>
  </head>
  <body>
    <button>Other things that have focus</button>
    <iframe src="frame.html" width="600" height="400" frameborder="0"></iframe>
  </body>
</html>
